HELP!

I've been trying to mod my BGEE on mac and I can't seem to get past this permissions thing. I'm far from a techie and I'm hoping someone on here can help. Here is the terminal error message :/Applications/Baldur's Gate - Enhanced Edition/Game Data/00777/Baldur's Gate - Enhanced Edition.app/Contents/Resources/OSX-bg1npc-v20/setup-bg1npc.command: line 5: ./setup-bg1npc: Permission denied